AI War:Tackle Drone Launcher

Has guns of its own but primarily attacks by launching small tractor-equipped drones.The drones fly in a straight line dragging any enemy they can tractor along with them and explode when they run out of fuel (happens much faster once they engage the tractors) or hit the edge of the gravity well, dealing damage to up to (5*drone level) nearby targets. The drones are thus very effective at taking smaller ships out of the fight but can not affect Tractor Immune ships.

How to use in your fleet

One of the very few units in the game that have the ability to move (most) enemy ships around.
These are pretty much pure crowd-control units. Place them back away from the fight and use the drones to break up the AI forces so you can defeat them in detail.
Keep in mind that the Tackle Drone Launcher itself is a decent combat unit however if you need to plug a gap in your lines, but for most engagements keeping them away from the fight will make more sense.